Pharmaceutical compound HydroxyzineClinical dataPronunciation/haɪˈdrɒksɪziːn/ Trade namesAtarax,[1] Vistaril,[2] othersOther namesUCB-4492AHFS/Drugs.comMonographMedlinePlusa682866License data US DailyMed: Hydroxyzine DependenceliabilityVery Low [3][4]AddictionliabilityNone-Very Low [5][6]Routes ofadministrationBy mouth, intramuscularDrug classFirst-generation antihistamine[7]ATC codeN05BB01 (WHO) N05BB51 (WHO)Legal statusLegal status AU: S4 (Prescription only) CA: ℞-only UK: POM (Prescription only) US: ℞-only EU: Rx-only In general: ℞ (Prescription only) Pharmacokinetic dataBioailabilityHighProtein binding93%MetabolismLiverMetabolitesCetirizine, othersElimination half-lifeAdults: 20.0 hours[8][9]Elderly: 29.3 hours[10]Children: 7.1 hours[8]ExcretionUrine, fecesIdentifiers IUPAC name (±)-2-(2-{4-[(4-chlorophenyl)-phenylmethyl]piperazin-1-yl}ethoxy)ethanol CAS Number68-88-2 Y 10246-75-0 (pamoate)as HCl: 2192-20-3PubChem CID3658as HCl: 91513IUPHAR/BPS7199DrugBankDB00557 Yas HCl: DBSALT000343ChemSpider3531 Yas HCl: 82634UNII30S50YM8OGas HCl: 76755771U3KEGGD08054 Yas HCl: D00672ChEBICHEBI:5818 Yas HCl: CHEBI:5819ChEMBLChEMBL896 Yas HCl: ChEMBL3186993CompTox Dashboard (EPA)DTXSID8023137 ECHA InfoCard100.000.630 Chemical and physical dataFormulaC21H27ClN2O2Molar mass374.91 g·mol−13D model (JSmol)Interactive image SMILES Clc1ccc(cc1)C(c2ccccc2)N3CCN(CC3)CCOCCO InChI InChI=1S/C21H27ClN2O2/c22-20-8-6-19(7-9-20)21(18-4-2-1-3-5-18)24-12-10-23(11-13-24)14-16-26-17-15-25/h1-9,21,25H,10-17H2 YKey:ZQDWXGKKHFNSQK-UHFFFAOYSA-N Y (verify)
Hydroxyzine, sold under the brand names Atarax and Vistaril among others, is an antihistamine medication.[11] It is used in the treatment of itchiness, anxiety, insomnia, and nausea (including that due to motion sickness).[11] It is used either by mouth or injection into a muscle.[11]
Hydroxyzine works by blocking the effects of histamine.[12] It is a first-generation antihistamine in the piperazine family of chemicals.[11][7] Common side effects include sleepiness, headache, and dry mouth.[11][12] Serious side effects may include QT prolongation.[12] It is unclear if use during pregnancy or breastfeeding is safe.[11]
It was first made by Union Chimique Belge in 1956 and was approved for sale by Pfizer in the United States later that year.[11][13] In 2023, it was the 39th most commonly prescribed medication in the United States, with more than 15 million prescriptions.[14][15]
Medical uses[edit] This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: "Hydroxyzine" – news · newspapers · books · scholar · JSTOR (December 2023) (Learn how and when to remove this message)Hydroxyzine is used in the treatment of itchiness, anxiety, and nausea due to motion sickness.[11]
A systematic review concluded that hydroxyzine outperforms placebo in treating generalized anxiety disorder. Insufficient data were ailable to compare the drug with benzodiazepines and buspirone.[16]
Hydroxyzine can also be used for the treatment of allergic conditions, such as chronic urticaria, atopic or contact dermatoses, and histamine-mediated pruritus.[medical citation needed] These he also been confirmed in both recent and past studies to he no adverse effects on the liver, blood, nervous system, or urinary tract.[17][better source needed]
Use of hydroxyzine for premedication as a sedative has no effects on tropane alkaloids, such as atropine, but may, following general anesthesia, potentiate meperidine and barbiturates, and use in pre-anesthetic adjunctive therapy should be modified depending upon the state of the individual.[17]
Doses of hydroxyzine hydrochloride used for sleep range from 25 to 100 mg.[18][19][20] As with other antihistamine sleep aids, hydroxyzine is usually only prescribed for short term or "as-needed" use since tolerance to the central nervous system (CNS) effects of hydroxyzine can develop in as little as a few days.[21][non-primary source needed] A major systematic review and network meta-analysis of medications for the treatment of insomnia published in 2022 found little evidence to inform the use of hydroxyzine for insomnia.[22] A 2023 meta-review concludes that hydroxyzine is effective for inducing sleep onset but less effective for maintaining sleep for eight hours.[23]
Contraindications[edit]Hydroxyzine is contraindicated for subcutaneous or intra-articular administration.[24]
The administration of hydroxyzine in large amounts by ingestion or intramuscular administration during the onset of pregnancy can cause fetal abnormalities. When administered to pregnant rats, mice, and rabbits, hydroxyzine caused abnormalities such as hypogonadism with doses significantly above that of the human therapeutic range.[25][better source needed]
In humans, a significant dose has not yet been established in studies, and, by default, the US Food and Drug Administration (FDA) has introduced contraindication guidelines regarding hydroxyzine.[25] Use by those at risk for or showing previous signs of hypersensitivity is also contraindicated.[25]
Other contraindications include the administration of hydroxyzine alongside depressants and other compounds that affect the central nervous system;[25] if necessary, it should only be administered concomitantly in small doses.[25] If administered in small doses with other substances, as mentioned, then patients should refrain from using dangerous machinery, motor vehicles, or any other practice requiring absolute concentration, under safety laws.[25]
Studies he also been conducted which show that long-term prescription of hydroxyzine can lead to tardive dyskinesia after years of use, but effects related to dyskinesia he also anecdotally been reported after periods of 7.5 months,[26] such as continual head rolling, lip licking, and other forms of athetoid movement. In certain cases, elderly patients' previous interactions with phenothiazine derivatives or pre-existing neuroleptic treatment may he contributed to dyskinesia at the administration of hydroxyzine due to hypersensitivity caused by prolonged treatment,[26] and therefore some contraindication is given for short-term administration of hydroxyzine to those with previous phenothiazine use.[26]
Side effects[edit] AtaraxSeveral reactions he been noted in manufacturer guidelines—deep sleep, incoordination, sedation, and dizziness he been reported in children and adults, as well as others such as hypotension, tinnitus, and headaches.[27][medical citation needed] Gastrointestinal effects he also been observed, as well as less serious effects such as dryness of the mouth and constipation caused by the mild antimuscarinic properties of hydroxyzine.[27][medical citation needed]
Central nervous system effects such as hallucinations or confusion he been observed in rare cases, attributed mostly to overdosage.[28][27] Such properties he been attributed to hydroxyzine in several cases, particularly in patients treated for neuropsychological disorders, as well as in cases where overdoses he been observed. While there are reports of hallucinogenic effects from use of hydroxyzine, several clinical data trials he not reported such side effects from the sole consumption of hydroxyzine, but rather, he described its overall calming effect described through the stimulation of areas within the reticular formation. The hallucinogenic or hypnotic properties he been described as being an additional effect from overall central nervous system suppression by other CNS agents, such as lithium or ethanol.[29]
Hydroxyzine exhibits anxiolytic and sedative properties in many psychiatric patients. One study showed that patients reported very high levels of subjective sedation when first taking the drug, but that levels of reported sedation decreased markedly over 5–7 days, likely due to CNS receptor desensitization. Other studies he suggested that hydroxyzine acts as an acute hypnotic, reducing sleep onset latency and increasing sleep duration—also showing that some drowsiness did occur. This was observed more in female patients, who also had greater hypnotic responses.[30] The use of sedating drugs alongside hydroxyzine can cause oversedation and confusion if administered at high doses—any form of hydroxyzine treatment alongside sedatives should be done under the supervision of a doctor.[31][28]
Because of the potential for more severe side effects, this drug is on the list to oid in the elderly.[32]
Pharmacology[edit] Pharmacodynamics[edit] Hydroxyzine[33] Site Ki (nM) Species Ref 5-HT2A 170 (IC50Tooltip Half-maximal inhibitory concentration) Rat [34] 5-HT2C ND ND ND α1 460 (IC50) Rat [34] D1 10000+ Mouse [35] D2 378560 (IC50) MouseRat [35][34] H1 2.0–196.4100 (IC50) HumanBovineRat [36][37][38][39][34] H2 ND ND ND H3 ND ND ND H4 10000+ Human [37] mAChTooltip Muscarinic acetylcholine receptor 460010000+10000+ (IC50)6310 (pA2)3800 HumanMouseRatGuinea pigBovine [40][35][34][41][39] VDCCTooltip Voltage-dependent calcium channel 3400+ (IC50) Rat [34] Values are Ki (nM), unless otherwise noted. The smaller the value, the more strongly the drug binds to the site.Hydroxyzine's predominant mechanism of action is as a potent and selective histamine H1 receptor inverse agonist.[42][43] This action is responsible for its antihistamine and sedative effects.[42][43] Unlike many other first-generation antihistamines, hydroxyzine has a lower affinity for the muscarinic acetylcholine receptors, and in accordance, has a lower risk of anticholinergic side effects.[39][43][44][45] In addition to its antihistamine activity, hydroxyzine has also been shown to act more weakly as an antagonist of the serotonin 5-HT2A receptor, the dopamine D2 receptor, and the α1-adrenergic receptor.[34][42] Similarly to the atypical antipsychotics, the comparably weak antiserotonergic effects of hydroxyzine likely underlie its usefulness as an anxiolytic.[46] Other antihistamines without such properties he not been found to be effective in the treatment of anxiety.[47]
Hydroxyzine crosses the blood–brain barrier easily and exerts effects in the central nervous system.[42] A positron emission tomography (PET) study found that brain occupancy of the H1 receptor was 67.6% for a single 30 mg dose of hydroxyzine.[48] In addition, subjective sleepiness correlated well with the brain H1 receptor occupancy.[48] PET studies with antihistamines he found that brain H1 receptor occupancy of more than 50% is associated with a high prevalence of somnolence and cognitive decline, whereas brain H1 receptor occupancy of less than 20% is considered to be non-sedative.[49]
Hydroxyzine also acts as a functional inhibitor of acid sphingomyelinase.[50]
Pharmacokinetics[edit]Hydroxyzine can be administered orally or via intramuscular injection. In both cases it is rapidly absorbed and distributed. It is metabolized in the liver and the main metabolite (45%), cetirizine is formed through oxidation of the alcohol moiety to a carboxylic acid by alcohol dehydrogenase. Overall effects are observed within one hour of administration. Higher concentrations are found in the skin than in the plasma. Cetirizine, although less sedating, is non-dialyzable and possesses similar antihistamine properties. Metabolites identified include an N-dealkylated metabolite and an O-dealkylated 1/16 metabolite with a plasma half-life of 59 hours. These pathways are mediated principally by CYP3A4 and CYP3A5.[51][52] The N-dealykylated metabolite, norchlorcyclizine, bears some structural similarities to trazodone, but it has not been established whether it is pharmacologically active.[53][54] In animals, hydroxyzine and its metabolites are excreted in feces primarily through biliary elimination.[55][56] In rats, less than 2% of the drug is excreted unchanged.[56]
The time to reach maximum concentration (Tmax) of hydroxyzine is about 2.0 hours in both adults and children and its elimination half-life is around 20.0 hours in adults (mean age 29.3 years) and 7.1 hours in children.[8][9] Its elimination half-life is shorter in children compared to adults.[8] In another study, the elimination half-life of hydroxyzine in elderly adults was 29.3 hours.[10] One study found that the elimination half-life of hydroxyzine in adults was as short as 3 hours, but this may he just been due to methodological limitations.[57] Although hydroxyzine has a long elimination half-life and acts, in-vivo, as an antihistamine for as long as 24 hours, the predominant CNS effects of hydroxyzine and other antihistamines with long half-lives seem to diminish after 8 hours.[58]
Administration in geriatrics differs from the administration of hydroxyzine in younger patients; according to the FDA, there he not been significant studies made (2004), which include population groups over 65, which provide a distinction between elderly aged patients and other younger groups. Hydroxyzine should be administered carefully in the elderly with consideration given to possible reduced elimination.[28][better source needed]
Chemistry[edit]Hydroxyzine is a member of the diphenylmethylpiperazine class of antihistamines.[medical citation needed]
Hydroxyzine is supplied mainly as a dihydrochloride salt (hydroxyzine hydrochloride) but also to a lesser extent as an embonate salt (hydroxyzine pamoate).[59][60][61] The molecular weights of hydroxyzine, hydroxyzine dihydrochloride, and hydroxyzine pamoate are 374.9 g/mol, 447.8 g/mol, and 763.3 g/mol, respectively.[7] Due to their differences in molecular weight, 1 mg hydroxyzine dihydrochloride is equivalent to about 1.7 mg hydroxyzine pamoate.[62]
Analogues[edit] This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (March 2023) (Learn how and when to remove this message)Analogues of hydroxyzine include buclizine, cetirizine, cinnarizine, cyclizine, etodroxizine, meclizine, and pipoxizine among others.[63]
Society and culture[edit] Brand names[edit] This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (March 2023) (Learn how and when to remove this message)Hydroxyzine preparations require a doctor's prescription. The drug is ailable in two formulations, the pamoate and the dihydrochloride or hydrochloride salts. Vistaril, Equipose, Masmoran, and Paxistil are preparations of the pamoate salt, while Atarax, Alamon, Aterax, Durrax, Tran-Q, Orgatrax, Quiess, and Tranquizine are of the hydrochloride salt.
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Medical uses vteAntihistamines (R06)Benzimidazoles (*) Astemizole Azelastine Bilastine Emedastine Mizolastine Talastine Diarylmethanes Diarylmethoxyalkylamines: Bromazine (bromodiphenhydramine) Carbinoxamine Chlorphenoxamine Clemastine Diphenhydramine (+naproxen) Diphenylpyraline Doxylamine Ebastine Orphenadrine Diphenylmethanolpiperidines: Fexofenadine Terfenadine Diphenylmethylpiperazines: Buclizine Cetirizine Levocetirizine Chlorcyclizine Cinnarizine Cyclizine Etodroxizine Hydroxyzine Meclizine Oxatomide Phenylpyridinylpropanamines: Brompheniramine Chlorphenamine Dexbrompheniramine (+pseudoephedrine) Dexchlorpheniramine (+betamethasone) Pheniramine Others: Acrivastine Bamipine Dimetindene Phenyltoloxamine Pyrrobutamine Quifenadine Triprolidine Ethylenediamines Antazoline Chloropyramine Histapyrrodine Mepyramine (pyrilamine) Methapyrilene Phenbenzamine Thenalidine Tripelennamine (pyribenzamine) Tricyclics Dibenzocycloheptenes: Antidepressants (e.g., amitriptyline) Azatadine Cyproheptadine Deptropine Desloratadine Ketotifen Loratadine Rupatadine Phenothiazines: Alimemazine Fenethazine Hydroxyethylpromethazine Isothipendyl Mequitazine Methdilazine Oxomemazine Promethazine Others: Antidepressants (e.g., doxepin, mirtazapine, trimipramine) Epinastine Latrepirdine Mebhydrolin Olopatadine Perlapine Phenindamine Pimethixene Others Phenylpiperazines: Antidepressants (e.g., trazodone) Phenbenzamine For topical use Bamipine Chloropyramine Chlorphenoxamine Clemastine Dimetindene Diphenhydramine Doxepin Isothipendyl Mepyramine (pyrilamine) Promethazine vteAntiemetics (A04)5-HT3 serotonin ion channel antagonists Alosetron Azasetron Bemesetron Cilansetron Clozapine Dazopride Dolasetron Granisetron Lerisetron Mianserin Mirtazapine Olanzapine Ondansetron Palonosetron (+netupitant) Quetiapine Ramosetron Ricasetron Tropisetron Zatosetron 5-HT serotonin G-protein receptor antagonists Clozapine Cyproheptadine Hydroxyzine Olanzapine Risperidone Ziprasidone CB1 agonists (cannabinoids) Dronabinol Nabilone Tetrahydrocannabinol (cannabis) D2/D3 antagonists Chlorpromazine Haloperidol Hydroxyzine Metoclopramide Metopimazine Prochlorperazine Thiethylperazine Trimethobenzamide H1 antagonists (antihistamines) Cyclizine Dimenhydrinate Diphenhydramine Hydroxyzine Meclizine Promethazine mACh antagonists (anticholinergics) Atropine Diphenhydramine Hydroxyzine (very mild) Hyoscyamine Scopolamine NK1 antagonists Aprepitant Fosaprepitant Maropitant Netupitant Rolapitant Others Amisulpride Cerium oxalate Dexamethasone Lorazepam Midazolam Propofol vteHypnotics/sedatives (N05C)GABAAAlcohols 2M2B Chloralodol Ethanol (alcohol) Diethylpropanediol Ethchlorvynol Methylpentynol Trichloroethanol Barbiturates Allobarbital Amobarbital Aprobarbital Barbital Butabarbital Butobarbital Cyclobarbital Ethallobarbital Heptabarb Hexobarbital Mephobarbital Methohexital Narcobarbital Pentobarbital Phenallymal Phenobarbital Propylbarbital Proxibarbal Reposal Secobarbital Talbutal Thiamylal Thiopental Thiotetrabarbital Vinbarbital Vinylbital Benzodiazepines Brotizolam Cinolazepam Climazolam Clonazolam Doxefazepam Estazolam Flubromazolam Flunitrazolam Flunitrazepam Flurazepam Flutemazepam Flutoprazepam Loprazolam Lormetazepam Midazolam Nimetazepam Nitemazepam Nitrazepam Nitrazolam Quazepam Temazepam Triazolam Carbamates Carisoprodol Emylcamate Ethinamate Hexapropymate Meprobamate Methocarbamol Phenprobamate Procymate Tybamate Imidazoles Etomidate Metomidate Propoxate Monoureides Acecarbromal Apronal (apronalide) Bromisoval Capuride Carbromal Ectylurea Neurosteroids Acebrochol Alfadolone Alfaxolone Brexanolone (allopregnanolone) Eltanolone (pregnanolone) Ganaxolone Hydroxydione Minaxolone Progesterone Renanolone Zuranolone Nonbenzodiazepines Eszopiclone Indiplon Lirequinil Necopidem Pagoclone Pazinaclone Saripidem Suproclone Suriclone Zaleplon Zolpidem Zopiclone Phenols Cipepofol (ciprofol) Fospropofol Propofol Propofol hemisuccinate Piperidinediones Glutethimide Methyprylon Piperidione Pyrithyldione Quinazolinones Afloqualone Cloroqualone Diproqualone Etaqualone Mebroqualone Mecloqualone Methaqualone Methylmethaqualone Nitromethaqualone SL-164 Others Acetophenone Acetylglycinamide chloral hydrate Bromide compounds Lithium bromide Potassium bromide Sodium bromide Centalun Chloral betaine Chloral hydrate Chloralose Clomethiazole Dichloralphenazone Gaboxadol (THIP) Ibotenic acid (Amanita muscaria) Kalactones Loreclezole Muscimol (Amanita muscaria) Paraldehyde Petrichloral Sesquiterpene Isovaleramide Isovaleric acid Valerenic acid Sulfonylalkanes Sulfonmethane (sulfonal) Tetronal Trional Triclofos GABAB 1,4-Butanediol 4-Fluorophenibut Aceburic acid Baclofen GABOB GHB (sodium oxybate) GBL GVL Phenibut Tolibut Valiloxybate (XW-10172) H1Antihistamines Captodiame Cyproheptadine Diphenhydramine Doxylamine Hydroxyzine Methapyrilene Perlapine Pheniramine Promethazine Propiomazine Antidepressants Serotonin antagonists and reuptake inhibitors Etoperidone Nefazodone Trazodone Tricyclic antidepressants Amitriptyline Doxepin Trimipramine, etc. Tetracyclic antidepressants Mianserin Mirtazapine, etc. Antipsychotics Typical antipsychotics Chlorpromazine Thioridazine, etc. Atypical antipsychotics Olanzapine Quetiapine Risperidone, etc. α2-Adrenergic Clonidine Detomidine Dexmedetomidine Lofexidine Medetomidine Romifidine Tasipimidine Tizanidine Xylazine 5-HT2AAntidepressants Trazodone Tricyclic antidepressants Amitriptyline Doxepin Trimipramine, etc. Tetracyclic antidepressants Mianserin Mirtazapine, etc. Antipsychotics Typical antipsychotics Chlorpromazine Thioridazine, etc. Atypical antipsychotics Olanzapine Quetiapine Risperidone, etc. Others Niaprazine Melatonin Agomelatine Melatonin Ramelteon Tasimelteon Orexin Daridorexant Lemborexant Suvorexant α2δ VDCC Atagabalin Gabapentin Gabapentin enacarbil Mirogabalin Phenibut Pregabalin Others Cannabinoids (e.g., cannabis, tetrahydrocannabinol/dronabinol, nabilone, cannabidiol, Zenivol) Chlorophenylalkyldiols Fenpentadiol Metaglycodol Phenaglycodol Diethylpropanediol Evoxine Fenadiazole GABA reuptake inhibitors (e.g., tiagabine) Guaifenesin-related muscle relaxants Chlorphenesin Mephenesin Mephenoxalone Metaxalone Methocarbamol Midaflur Opioids (e.g., morphine) Passion flower Phemerazole Scopolamine Serotonin precursors (e.g., tryptophan, 5-hydroxytryptophan (5-HTP; oxitriptan)) Trazodone UMB68 Valnoctamide vteAnxiolytics (N05B)5-HT1ARTooltip 5-HT1A receptor agonists Buspirone Gepirone Tandospirone GABAARTooltip GABAA receptor PAMsTooltip positive allosteric modulators Benzodiazepines: Adinazolam Alprazolam Bromazepam Camazepam Chlordiazepoxide Clobazam Clonazepam Clorazepate Clotiazepam Cloxazolam Diazepam# Ethyl loflazepate Etizolam Fludiazepam Halazepam Ketazolam Lorazepam# Medazepam Nordazepam Oxazepam Pinazepam Prazepam; Others: Alpidem‡ Barbiturates (e.g., phenobarbital) Carbamates (e.g., meprobamate) Carisoprodol Chlormezanone‡ Ethanol (alcohol) Etifoxine Gabapentinoids(α2δ VDCC blockers) Gabapentin Gabapentin enacarbil Phenibut Pregabalin Antidepressants SSRIsTooltip Selective serotonin reuptake inhibitors (e.g., escitalopram) SNRIsTooltip Serotonin-norepinephrine reuptake inhibitors (e.g., duloxetine) SARIsTooltip Serotonin antagonist and reuptake inhibitors (e.g., trazodone) TCAsTooltip Tricyclic antidepressants (e.g., clomipramine#) TeCAsTooltip Tetracyclic antidepressants (e.g., mirtazapine) MAOIsTooltip Monoamine oxidase inhibitors (e.g., phenelzine); Others: Agomelatine Bupropion Tianeptine Vilazodone Vortioxetine Sympatholytics(Antiadrenergics) Alpha-1 blockers (e.g., prazosin) Alpha-2 agonists (e.g., clonidine, dexmedetomidine, guanfacine) Beta blockers (e.g., propranolol, atenolol, betaxolol, nadolol, oxprenolol, pindolol) Others Benzoctamine Cycloserine Fabomotizole Hydroxyzine Lorpiprazole Mebicar Mepiprazole Nicotine (tobacco) Opipramol Oxaflozane‡ Phenaglycodol Phenibut Picamilon Selank Tiagabine Tofisopam Validolum #WHO-EM ‡Withdrawn from market Clinical trials: †Phase III §Never to phase III Pharmacodynamics vteAdrenergic receptor modulatorsα1Agonists 6-FNE Amidephrine Buspirone Cirazoline Corbadrine Deoxyepinephrine (epinine, N-methyldopamine) Desglymidodrine Dexisometheptene Dipivefrine Dopamine Droxidopa (L-DOPS) Epinephrine Etilefrine Etilevodopa Ethylnorepinephrine Ibopamine Indanidine Isometheptene L-DOPA (levodopa) L-Phenylalanine L-Tyrosine Melevodopa Metaraminol Methoxamine Methyldopa Midodrine Naphazoline Norepinephrine Octopamine Oxymetazoline Phenylephrine Phenylpropanolamine Synephrine Tetryzoline Tiamenidine XP21279 Xylometazoline Antagonists Abanoquil ADRIANA Ajmalicine Alfuzosin Anisodamine Anisodine Atiprosin Atypical antipsychotics (e.g., brexpiprazole, clozapine, olanzapine, quetiapine, risperidone) Benoxathian Beta blockers (e.g., adimolol, amosulalol, arotinolol, carvedilol, eugenodilol, labetalol) Buflomedil Bunazosin Corynanthine Dapiprazole Domesticine Doxazosin Ergolines (e.g., acetergamine, ergotamine, dihydroergotamine, lisuride, nicergoline, terguride) Etoperidone Fenspiride Hydroxyzine Indoramin Ketanserin L-765,314 mCPP Mepiprazole Metazosin Monatepil Moxisylyte Naftopidil Nantenine Neldazosin Niaprazine Niguldipine Pardoprunox Pelanserin Perlapine Phendioxan Phenoxybenzamine Phentolamine Phenylpiperazine antidepressants (e.g., hydroxynefazodone, nefazodone, trazodone, triazoledione) Piperoxan Prazosin Quinazosin Quinidine Silodosin Spegatrine Spiperone Talipexole Tamsulosin Terazosin Tiodazosin Tolazoline Tetracyclic antidepressants (e.g., amoxapine, maprotiline, mianserin) Tricyclic antidepressants (e.g., amitriptyline, clomipramine, doxepin, imipramine, trimipramine) Trimazosin Typical antipsychotics (e.g., chlorpromazine, fluphenazine, loxapine, thioridazine) Urapidil WB-4101 Zolertine α2Agonists (R)-3-Nitrobiphenyline 4-NEMD 6-FNE Amitraz Apraclonidine Brimonidine CHF-1024 Clonidine Corbadrine Deoxyepinephrine (epinine, N-methyldopamine) Detomidine Dexmedetomidine Dihydroergotamine Dipivefrine Dopamine Droxidopa (L-DOPS) Etilevodopa Ergotamine Epinephrine Etilefrine Ethylnorepinephrine Guanabenz Guanfacine Guanoxabenz L-DOPA (levodopa) L-Phenylalanine L-Tyrosine Ibopamine Lofexidine Medetomidine Melevodopa Methyldopa Mivazerol Moxonidine Naphazoline Nolomirole Norepinephrine Oxymetazoline Phenylpropanolamine Piperoxan PS75 Rezatomidine Rilmenidine Romifidine Talipexole Tasipimidine Tetryzoline Tiamenidine Tizanidine Tolonidine Urapidil Vatinoxan XP21279 Xylazine Xylometazoline Antagonists 1-PP Adimolol Amesergide Aptazapine Atipamezole Atypical antipsychotics (e.g., asenapine, brexpiprazole, clozapine, lurasidone, olanzapine, paliperidone, quetiapine, risperidone, zotepine) Azapirones (e.g., buspirone, gepirone, ipsapirone, tandospirone) BRL-44408 Buflomedil Cirazoline Efaroxan Esmirtazapine Fenmetozole Fluparoxan Idazoxan Ketanserin Lisuride mCPP Mianserin Mirtazapine NAN-190 Pardoprunox Phentolamine Phenoxybenzamine Piperoxan Piribedil Rauwolscine Rotigotine Setiptiline Spegatrine Spiroxatrine Sunepitron Terguride Tolazoline Typical antipsychotics (e.g., chlorpromazine, fluphenazine, loxapine, thioridazine) Yohimbine βAgonists Abediterol Alifedrine Amibegron Arbutamine Arformoterol Arotinolol BAAM Bambuterol Befunolol Bitolterol Broxaterol Buphenine Butopamine Carbuterol Carmoterol Cimaterol Clenbuterol Colterol Corbadrine Denopamine Deoxyepinephrine (epinine, N-methyldopamine) Dipivefrine Dobutamine Dopamine Dopexamine Droxidopa (L-DOPS) Epinephrine Etafedrine Etilefrine Etilevodopa Ethylnorepinephrine Eugenodilol Fenoterol Formoterol Hexoprenaline Higenamine Ibopamine Indacaterol Isoetarine Isoprenaline Isoxsuprine L-DOPA (levodopa) L-Phenylalanine L-Tyrosine Levosalbutamol Lubabegron Mabuterol Melevodopa Methoxyphenamine Methyldopa Mirabegron Norepinephrine Orciprenaline Oxyfedrine PF-610355 Phenylpropanolamine Pirbuterol Prenalterol Ractopamine Procaterol Reproterol Rimiterol Ritodrine Salbutamol Salmeterol Solabegron Terbutaline Tretoquinol Tulobuterol Vibegron Vilanterol Xamoterol XP21279 Zilpaterol Zinterol Antagonists Acebutolol Adaprolol Adimolol Afurolol Alprenolol Alprenoxime Amosulalol Ancarolol Arnolol Arotinolol Atenolol Befunolol Betaxolol Bevantolol Bisoprolol Bopindolol Bornaprolol Brefonalol Bucindolol Bucumolol Bufetolol Bufuralol Bunitrolol Bunolol Bupranolol Butaxamine Butidrine Butofilolol Capsinolol Carazolol Carpindolol Carteolol Carvedilol Celiprolol Cetamolol Cicloprolol Cinamolol Cloranolol Cyanopindolol Dalbraminol Dexpropranolol Diacetolol Dichloroisoprenaline Dihydroalprenolol Dilevalol Diprafenone Draquinolol Ecastolol Epanolol Ericolol Ersentilide Esatenolol Esprolol Eugenodilol Exaprolol Falintolol Flestolol Flusoxolol Hydroxycarteolol Hydroxytertatolol ICI-118,551 Idropranolol Indenolol Indopanolol Iodocyanopindolol Iprocrolol Isoxaprolol Isamoltane Labetalol Landiolol Levobetaxolol Levobunolol Levomoprolol Medroxalol Mepindolol Metipranolol Metoprolol Moprolol Nadolol Nadoxolol Nebivolol Nifenalol Nipradilol Oxprenolol Pacrinolol Pafenolol Pamatolol Pargolol Penbutolol Pindolol Practolol Primidolol Procinolol Pronethalol Propafenone Propranolol Ridazolol Ronactolol Soquinolol Sotalol Spirendolol SR 59230A Sulfinalol Talinolol Tazolol Tertatolol Tienoxolol Tilisolol Timolol Tiprenolol Tolamolol Toliprolol Xibenolol Xipranolol See also: Receptor/signaling modulators Dopaminergics Serotonergics Monoamine reuptake inhibitors Monoamine releasing agents Monoamine metabolism modulators Monoamine neurotoxins vteDopamine receptor modulatorsD1-likeAgonists Benzazepines: 6-Br-APB Fenoldopam SKF-38,393 SKF-77,434 SKF-81,297 SKF-82,958 SKF-83,959 Trepipam Zelandopam Ergolines: Cabergoline CY-208,243 Dihydroergocryptine LEK-8829 Lisuride Pergolide Terguride Dihydrexidine derivatives: A-77636 A-86929 Adrogolide (ABT-431, DAS-431) Dihydrexidine Dinapsoline Dinoxyline Doxanthrine Phenethylamines: BCO-001 Deoxyepinephrine (N-methyldopamine, epinine) Dopexamine Etilevodopa Ibopamine L-DOPA (levodopa) Melevodopa L-Phenylalanine L-Tyrosine XP21279 Others: A-68930 Apomorphine Isocorypalmine Nuciferine PF-6649751 PF 6669571 Propylnorapomorphine Rotigotine SKF-89,145 SKF-89,626 Stepholidine Tapadon Tetrahydropalmatine PAMs Tetrahydroisoquinolines: DETQ DPTQ Mevidalen Antagonists Typical antipsychotics: Butaclamol Chlorpromazine Chlorprothixene Flupentixol (flupenthixol) (+melitracen) Fluphenazine Loxapine Perphenazine (+amitriptyline) Pifluthixol Thioridazine Thiothixene Trifluoperazine (+tranylcypromine) Zuclopenthixol Atypical antipsychotics: Asenapine Clorotepine Clotiapine Clozapine DHA-clozapine Fluperlapine Iloperidone Norclozapine Norquetiapine Olanzapine (+fluoxetine) Paliperidone Quetiapine Risperidone Tefludazine Zicronapine Ziprasidone Zotepine Others: Berupipam Ecopipam EEDQ Metitepine (methiothepin) Odapipam Perlapine SCH-23390 D2-likeAgonists Adamantanes: Amantadine Memantine Rimantadine Aminotetralins: 5-OH-DPAT 7-OH-DPAT 8-OH-PBZI CHF-1024 Nolomirole Rotigotine UH-232 Ergolines: Bromocriptine Cabergoline Chanocline Dihydroergocryptine Disulergine Dosergoside Epicriptine Ergocornine Etisulergine Lergotrile Lisuride LSD Mesulergine Metergoline Pergolide Proterguride Terguride Dihydrexidine derivatives: 2-OH-NPA Ciladopa Dihydrexidine Dinoxyline N,N-Propyldihydrexidine Phenethylamines: Deoxyepinephrine (N-methyldopamine, epinine) Dopexamine Etilevodopa Ibopamine L-DOPA (levodopa) L-Phenylalanine L-Tyrosine Melevodopa XP21279 Atypical antipsychotics: Alentemol (U-66444B) Aripiprazole (+sertraline) Aripiprazole lauroxil Bifeprunox Brexpiprazole Brilaroxazine Cariprazine F-15063 Lumateperone Norclozapine Others: 3-PPP A-412997 ABT-670 ABT-724 Adrafinil Aplindore Apomorphine Arketamine Armodafinil BP-897 Captodiame CP-226,269 Dizocilpine Esketamine Flibanserin Ketamine Modafinil Naxagolide OSU-6162 Pardoprunox PD-128,907 PD-168,077 PF-219,061 PF-592,379 Phencyclidine Piribedil Pramipexole Preclamol Propylnorapomorphine Pukateine Quinagolide Quinelorane Quinpirole RDS-127 Ro10-5824 Ropinirole Roxindole Salvinorin A SKF-39315 SKF-83,959 Sumanirole Talipexole Umespirone WAY-100,635 Antagonists Typical antipsychotics: Acepromazine Acetophenazine Azaperone Benperidol Bromperidol Butaclamol Butaperazine Chloracizine Chlorproethazine Chlorpromazine Chlorprothixene Ciclindole Clopenthixol Clothixamide Clopimozide Droperidol Fluacizine Fluanisone Flucindole Fluotracen Flupentixol (flupenthixol) (+melitracen) Fluphenazine Fluprothixene Fluspirilene Haloperidol Homopipramol Lenperone Levomepromazine (methotrimeprazine) Levosulpiride Loxapine Mesoridazine Moperone Naranol Nemonapride Penfluridol Perathiepin Perazine Pericyazine (periciazine) Perphenazine (+amitriptyline) Piflutixol (pifluthixol) Pimozide Pipamperone Preclamol Prochlorperazine Promazine Prothipendyl Spiperone (spiroperidol) Sulforidazine Sulpiride Sultopride Teflutixol Thiopropazate Thioproperazine Thioridazine Thiothixene Timiperone Trifluoperazine (+tranylcypromine) Triflupromazine Trifluperidol Zetidoline Zuclopenthixol Atypical antipsychotics: Amisulpride Asenapine BL-1020 Blonanserin Carpipramine Cinuperone Clocapramine Clorotepine Clotiapine (clothiapine) Clozapine Cyamemazine DHA-clozapine Dixyrazine Elopiprazole Flumezapine Fluperlapine Gevotroline Iloperidone Lurasidone Mazapertine Melperone Molindone Mosapramine Ocaperidone Olanzapine (+fluoxetine) Paliperidone Perospirone Piperacetazine Pipotiazine Piquindone Quetiapine Remoxipride Risperidone Sertindole Tefludazine Tenilapine Tiospirone Veralipride Zicronapine Ziprasidone Zotepine Antiemetics/gastroprokinetics/sedatives: Aceprometazine AS-8112 Alimemazine Alizapride Benzquinamide Bromopride Clebopride Deudomperidone Domperidone Eticlopride Hydroxyzine Itopride Metoclopramide Metopimazine Promethazine Thiethylperazine Trazpiroben Trimethobenzamide Antidepressants: Amoxapine Nefazodone Opipramol Propiomazine Trimipramine Others: 3-PPP Alpiropride Azapride Bromerguride Bromocriptine Buspirone Carmoxirole Desmethoxyfallypride EEDQ F-15063 Fallypride Fananserin Fenfluramine Iodobenzamide Isocorypalmine L-741,626 L-745,870 Levofenfluramine LEK-8829 Metitepine (methiothepin) N-Methylspiperone Nafadotride Nuciferine PNU-99,194 Pridopidine Raclopride Sarizotan SB-277,011-A Seridopidine Sonepiprazole Spiroxatrine Stepholidine SV-293 Tetrahydropalmatine Tiapride UH-232 Yohimbine See also: Receptor/signaling modulators Adrenergics Serotonergics Monoamine reuptake inhibitors Monoamine releasing agents Monoamine metabolism modulators Monoamine neurotoxins vteHistamine receptor modulatorsH1Agonists 2-Pyridylethylamine Betahistine Histamine HTMT L-Histidine UR-AK49 Antagonists First-generation: 4-Methyldiphenhydramine Alimemazine Antazoline Azatadine Bamipine Benzatropine (benztropine) Bepotastine Bromazine Brompheniramine Buclizine Captodiame Carbinoxamine Chlorcyclizine Chloropyramine Chlorothen Chlorphenamine Chlorphenoxamine Cinnarizine Clemastine Clobenzepam Clocinizine Cloperastine Cyclizine Cyproheptadine Dacemazine Decloxizine Deptropine Dexbrompheniramine Dexchlorpheniramine Dimenhydrinate Dimetindene Diphenhydramine Diphenylpyraline Doxylamine Embramine Etodroxizine Etybenzatropine (ethylbenztropine) Etymemazine Fenethazine Flunarizine Histapyrrodine Homochlorcyclizine Hydroxyethylpromethazine Hydroxyzine Isopromethazine Isothipendyl LY-2624803 (HY-10275) Meclozine Medrylamine Mepyramine (pyrilamine) Mequitazine Methafurylene Methapyrilene Methdilazine Moxastine Orphenadrine Oxatomide Oxomemazine Perlapine Phenindamine Pheniramine Phenyltoloxamine Pimethixene Piperoxan Pipoxizine Promethazine Propiomazine Pyrrobutamine Talastine Thenalidine Thenyldiamine Thiazinamium Thonzylamine Tolpropamine Tripelennamine Triprolidine Second/third-generation: Acrivastine Alinastine Astemizole Azelastine Bamirastine Barmastine Bepiastine Bepotastine Bilastine Cabastinen Carebastine Cetirizine Clemastine Clemizole Clobenztropine Desloratadine Dorastine Ebastine Efletirizine Emedastine Epinastine Fexofenadine Flezelastine Ketotifen Latrepirdine Levocabastine Levocetirizine Linetastine Loratadine Mapinastine Mebhydrolin Mizolastine Moxastine Noberastine Octastine Olopatadine Perastine Pibaxizine Piclopastine Quifenadine (phencarol) Rocastine Rupatadine Setastine Sequifenadine (bicarphen) Talastine Temelastine Terfenadine Vapitadine Zepastine Others: Atypical antipsychotics (e.g., aripiprazole, asenapine, brexpiprazole, brilaroxazine, clozapine, iloperidone, olanzapine, paliperidone, quetiapine, risperidone, ziprasidone, zotepine) Phenylpiperazine antidepressants (e.g., hydroxynefazodone, nefazodone, trazodone, triazoledione) Tetracyclic antidepressants (e.g., amoxapine, loxapine, maprotiline, mianserin, mirtazapine, oxaprotiline) Tricyclic antidepressants (e.g., amitriptyline, butriptyline, clomipramine, desipramine, dosulepin (dothiepin), doxepin, imipramine, iprindole, lofepramine, nortriptyline, protriptyline, trimipramine) Typical antipsychotics (e.g., chlorpromazine, flupenthixol, fluphenazine, loxapine, perphenazine, prochlorperazine, thioridazine, thiothixene) Unknown/unsorted: Azanator Belarizine Elbanizine Flotrenizine GSK1004723 Napactadine Tagorizine Trelnarizine Trenizine H2Agonists Amthamine Betazole Dimaprit Histamine HTMT Impromidine L-Histidine UR-AK49 Antagonists Bisfentidine Burimamide Cimetidine Dalcotidine Donetidine Ebrotidine Etintidine Famotidine Isolamtidine Lafutidine Lamtidine Loltidine (loxtidine) Lupitidine Metiamide Mifentidine Niperotidine Nizatidine Osutidine Oxmetidine Pibutidine Quisultazine (quisultidine) Ramixotidine Ranitidine Roxatidine Sufotidine Tiotidine Tuvatidine Venritidine Xaltidine Zolantidine H3Agonists α-Methylhistamine BP 2.94 Cipralisant (GT-2331) GT-2203 (VUF-5296) Histamine Imetit Immepip Immethridine (BP-1-5375) L-Histidine Methimepip Proxyfan SCH-50971 VUF-5297 Antagonists A-349821 A-423579 ABT-239 ABT-652 AZD5213 Bisant Betahistine Burimamide Ciproxifan Clobenpropit Conessine Enerisant GSK-189254 Impentamine Iodophenpropit Irdabisant JNJ-5207852 NNC 38-1049 PF-03654746 Pitolisant SCH-79687 Thioperamide VUF-5681 H4Agonists 4-Methylhistamine α-Methylhistamine Histamine L-Histidine OUP-16 VUF-8430 Antagonists JNJ-7777120 Mianserin Seliforant Thioperamide Toreforant VUF-6002 See also Receptor/signaling modulators Monoamine metabolism modulators Monoamine reuptake inhibitors vteSerotonin receptor modulators5-HT15-HT1A Agonists: 4-F-5-MeO-pyr-T 5-MeO-pip-T 5-MeO-pyr-T 8-OH-DPAT Adatanserin Amphetamine Antidepressants (e.g., etoperidone, hydroxynefazodone, nefazodone, trazodone, triazoledione, vilazodone, vortioxetine) Atypical antipsychotics (e.g., aripiprazole, asenapine, brexpiprazole, cariprazine, clozapine, lurasidone, quetiapine, ziprasidone) Azapirones (e.g., buspirone, eptapirone, gepirone, perospirone, tandospirone) Bay R 1531 Befiradol BMY-14802 Cannabidiol Dimemebfe Dopamine Ebalzotan Eltoprazine Enciprazine Ergolines (e.g., bromocriptine, cabergoline, dihydroergotamine, ergotamine, lisuride, LSD, methylergometrine (methylergonovine), methysergide, pergolide) F-11461 F-12826 F-13714 F-14679 F-15063 F-15599 Flesinoxan Flibanserin Flumexadol Hypidone Lesopitron LY-293284 LY-301317 mCPP MKC-242 Naluzotan NBUMP Osemozotan Oxaflozane Pardoprunox Piclozotan Rauwolscine Repinotan Roxindole RU-24969 S-14506 S-14671 S-15535 Sarizotan Serotonin (5-HT) SSR-181507 Sunepitron Tryptamines (e.g., 5-CT, 5-MeO-DMT, 5-MT, bufotenin, DMT, indorenate, N-Me-5-HT, psilocin, psilocybin) TGBA01AD TMU4142 U-92016-A Urapidil Vilazodone Xaliproden Yohimbine Positive allosteric modulators: Oleamide Antagonists: Atypical antipsychotics (e.g., iloperidone, risperidone, sertindole) 965 Beta blockers (e.g., alprenolol, carteolol, cyanopindolol, iodocyanopindolol, isamoltane, oxprenolol, penbutolol, pindobind, pindolol, propranolol, tertatolol) BMY-7378 CSP-2503 Dotarizine Ergolines (e.g., metergoline) FCE-24379 Flopropione GR-46611 Isamoltane Lecozotan Mefway Metitepine (methiothepin) MIN-117 (WF-516) MPPF NAN-190 Robalzotan S-15535 SB-649915 SDZ 216-525 Spiperone Spiramide Spiroxatrine UH-301 WAY-100135 WAY-100635 Xylamidine Unknown/unsorted: Acetryptine Carvedilol Ergolines (e.g., ergometrine (ergonovine)) 5-HT1B Agonists: Anpirtoline AZ10419369 Benzofurans (e.g., 5-MAPB, 6-MAPB, BK-5-MAPB, BK-6-MAPB) Benzothiophenes (e.g., 5-MAPBT, 6-MAPBT, BK-5-MAPBT) CGS-12066A CP-93129 CP-94253 CP-122288 CP-135807 Eltoprazine Ergolines (e.g., bromocriptine, dihydroergotamine, ergotamine, methylergometrine (methylergonovine), methysergide, pergolide) mCPP Methylenedioxyphenethylamines (e.g., MDMA, methylone) PZKKN-94 RU-24969 Serotonin (5-HT) Triptans (e.g., itriptan, donitriptan, eletriptan, sumatriptan, zolmitriptan) TFMPP Tryptamines (e.g., 5-BT, 5-CT, 5-MT, DMT) Vortioxetine Antagonists: AR-A000002 Beta blockers (e.g., alprenolol, carteolol, isamoltane, oxprenolol, penbutolol, propranolol, tertatolol) Elzasonan Ergolines (e.g., metergoline) GR-127935 Isamoltane LY-393558 Metitepine (methiothepin) SB-216641 SB-224289 SB-236057 Yohimbine Unknown/unsorted: Ergolines (e.g., cabergoline, ergometrine (ergonovine), lisuride) 5-HT1D Agonists: CP-122288 CP-135807 CP-286601 Ergolines (e.g., bromocriptine, cabergoline, dihydroergotamine, ergotamine, LSD, methysergide) GR-46611 L-694247 L-772405 mCPP PNU-109291 PNU-142633 Serotonin (5-HT) TGBA01AD Triptans (e.g., almotriptan, itriptan, donitriptan, eletriptan, frovatriptan, naratriptan, rizatriptan, sumatriptan, zolmitriptan) Tryptamines (e.g., 5-BT, 5-CT, 5-Et-DMT, 5-MT, 5-(nonyloxy)tryptamine, DMT) Antagonists: Alniditan BRL-15572 Elzasonan Ergolines (e.g., metergoline) GR-127935 Ketanserin LY-310762 LY-367642 LY-393558 LY-456219 LY-456220 Metitepine (methiothepin) Mianserin Ritanserin Yohimbine Ziprasidone Unknown/unsorted: Acetryptine Ergolines (e.g., lisuride, lysergol, pergolide) 5-HT1E Agonists: BRL-54443 Ergolines (e.g., methysergide) Serotonin (5-HT) Triptans (e.g., eletriptan) Tryptamines (e.g., tryptamine) Antagonists: Metitepine (methiothepin) Unknown/unsorted: Ergolines (e.g., ergometrine (ergonovine), lysergol, methylergometrine (methylergonovine) 5-HT1F Agonists: BRL-54443 CP-122288 Ergolines (e.g., bromocriptine, lysergol, methylergometrine (methylergonovine) methysergide) Lasmiditan LY-334370 LY-344864 Serotonin (5-HT) Triptans (e.g., eletriptan, naratriptan, sumatriptan) Tryptamines (e.g., 5-MT) Antagonists: Metitepine (methiothepin) Mianserin 5-HT25-HT2A Agonists: 25H/NB series (e.g., 25I-NBF, 25I-NBMD, 25I-NBOH, 25I-NBOMe, 25B-NBOMe, 25C-NBOMe, 25TFM-NBOMe, 2CBCB-NBOMe, 25CN-NBOH, 2CBFly-NBOMe) 2Cs (e.g., 2C-B, 2C-E, 2C-I, 2C-T-2, 2C-T-7, 2C-T-21) 2C-B-FLY 2CB-Ind 5-Methoxytryptamines (5-MeO-DET, 5-MeO-DiPT, 5-MeO-DMT, 5-MeO-DPT, 5-MT) α-Alkyltryptamines (e.g., 5-Cl-αMT, 5-Fl-αMT, 5-MeO-αET, 5-MeO-αMT, α-Me-5-HT, αET, αMT) AL-34662 AL-37350A Bromo-DragonFLY Dimemebfe DMBMPP DOx (e.g., DOB, DOC, DOI, DOM) Efirenz Ergolines (e.g., 1P-LSD, ALD-52, bromocriptine, cabergoline, ergine (LSA), ergometrine (ergonovine), ergotamine, lisuride, LA-SS-Az, LSB, LSD, LSD-Pip, LSH, LSP, methylergometrine (methylergonovine), pergolide) Flumexadol IHCH-7113 Jimscaline Lorcaserin MDxx (e.g., MDA (tenamfetamine), MDMA (midomafetamine), MDOH, MMDA) O-4310 Oxaflozane PHA-57378 PNU-22394 PNU-181731 RH-34 SCHEMBL5334361 Phenethylamines (e.g., lophophine, mescaline) Piperazines (e.g., BZP, quipazine, TFMPP) Serotonin (5-HT) TCB-2 TFMFly Tryptamines (e.g., 5-BT, 5-CT, bufotenin, DET, DiPT, DMT, DPT, psilocin, psilocybin, tryptamine) Positive allosteric modulators: CTW0404 CTW0419 JPC0323 (R)-Glaucine Oleamide Antagonists: 5-I-R91150 5-MeO-NBpBrT AC-90179 Adatanserin Altanserin Antihistamines (e.g., cyproheptadine, hydroxyzine, ketotifen, perlapine) AMDA Atypical antipsychotics (e.g., amperozide, aripiprazole, asenapine, blonanserin, brexpiprazole, carpipramine, clocapramine, clorotepine, clozapine, fluperlapine, gevotroline, iloperidone, lurasidone, melperone, mosapramine, ocaperidone, olanzapine, paliperidone, quetiapine, risperidone, sertindole, zicronapine, ziprasidone, zotepine) Chlorprothixene Cinanserin CSP-2503 Deramciclane Dotarizine Eplivanserin Ergolines (e.g., amesergide, LY-53857, LY-215840, mesulergine, metergoline, methysergide, sergolexole) Fananserin Flibanserin Glemanserin Irindalone Ketanserin KML-010 Landipirdine LY-393558 mCPP Medifoxamine Metitepine (methiothepin) MIN-117 (WF-516) Naftidrofuryl Nantenine Nelotanserin Opiranserin (VVZ-149) Pelanserin Phenoxybenzamine Pimanserin Pirenperone Pizotifen Pruvanserin Rauwolscine Ritanserin Roluperidone S-14671 Sarpogrelate Serotonin antagonists and reuptake inhibitors (e.g., etoperidone, hydroxynefazodone, lubazodone, mepiprazole, nefazodone, triazoledione, trazodone) SR-46349B TGBA01AD Teniloxazine Temanogrel Tetracyclic antidepressants (e.g., amoxapine, aptazapine, esmirtazapine, maprotiline, mianserin, mirtazapine) Tricyclic antidepressants (e.g., amitriptyline) Typical antipsychotics (e.g., chlorpromazine, fluphenazine, haloperidol, loxapine, perphenazine, pimozide, pipamperone, prochlorperazine, setoperone, spiperone, spiramide, thioridazine, thiothixene, trifluoperazine) Volinanserin Xylamidine Yohimbine Unknown/unsorted: Ergolines (e.g., dihydroergotamine, nicergoline) 5-HT2B Agonists: 4-Methylaminorex Aminorex Amphetamines (e.g., chlorphentermine, cloforex, dexfenfluramine, fenfluramine, levofenfluramine, norfenfluramine) BW-723C86 DOx (e.g., DOB, DOC, DOI, DOM) Ergolines (e.g., cabergoline, dihydroergocryptine, dihydroergotamine, ergotamine, methylergometrine (methylergonovine), methysergide, pergolide) Lorcaserin MDxx (e.g., MDA (tenamfetamine), MDMA (midomafetamine), MDOH, MMDA) Piperazines (e.g., TFMPP) PNU-22394 Ro60-0175 Serotonin (5-HT) Tryptamines (e.g., 5-BT, 5-CT, 5-MT, α-Me-5-HT, bufotenin, DET, DiPT, DMT, DPT, psilocin, psilocybin, tryptamine) Antagonists: Agomelatine Atypical antipsychotics (e.g., amisulpride, aripiprazole, asenapine, brexpiprazole, cariprazine, clozapine, N-desalkylquetiapine (norquetiapine), N-desmethylclozapine (norclozapine), olanzapine, pipamperone, quetiapine, risperidone, ziprasidone) Cyproheptadine EGIS-7625 Ergolines (e.g., amesergide, bromocriptine, lisuride, LY-53857, LY-272015, mesulergine) Ketanserin LY-393558 mCPP Metadoxine Metitepine (methiothepin) Pirenperone Pizotifen Propranolol PRX-08066 Rauwolscine Ritanserin RS-127445 Sarpogrelate SB-200646 SB-204741 SB-206553 SB-215505 SB-221284 SB-228357 SDZ SER-082 Tegaserod Tetracyclic antidepressants (e.g., amoxapine, mianserin, mirtazapine) Trazodone Typical antipsychotics (e.g., chlorpromazine) TIK-301 Yohimbine Unknown/unsorted: Ergolines (e.g., ergometrine (ergonovine)) 5-HT2C Agonists: 2Cs (e.g., 2C-B, 2C-E, 2C-I, 2C-T-2, 2C-T-7, 2C-T-21) 5-Methoxytryptamines (5-MeO-DET, 5-MeO-DiPT, 5-MeO-DMT, 5-MeO-DPT, 5-MT) α-Alkyltryptamines (e.g., 5-Cl-αMT, 5-Fl-αMT, 5-MeO-αET, 5-MeO-αMT, α-Me-5-HT, αET, αMT) A-372159 AL-38022A Alstonine Centhaquine CP-809101 Dimemebfe DOx (e.g., DOB, DOC, DOI, DOM) Ergolines (e.g., ALD-52, cabergoline, dihydroergotamine, ergine (LSA), ergotamine, lisuride, LA-SS-Az, LSB, LSD, LSD-Pip, LSH, LSP, pergolide) Flumexadol Lorcaserin MDxx (e.g., MDA (tenamfetamine), MDMA (midomafetamine), MDOH, MMDA) MK-212 ORG-12962 ORG-37684 Oxaflozane PHA-57378 Phenethylamines (e.g., lophophine, mescaline) Piperazines (e.g., aripiprazole, BZP, mCPP, quipazine, TFMPP) PNU-22394 PNU-181731 Ro60-0175 Ro60-0213 Serotonin (5-HT) Tryptamines (e.g., 5-BT, 5-CT, bufotenin, DET, DiPT, DMT, DPT, psilocin, psilocybin, tryptamine) Vabicaserin WAY-629 WAY-161503 YM-348 Positive allosteric modulators: CTW0415 CYD-1-79 JPC0323 Oleamide PNU-69176E VA012 VA240 Antagonists: Adatanserin Agomelatine Atypical antipsychotics (e.g., asenapine, clorotepine, clozapine, fluperlapine, iloperidone, melperone, olanzapine, paliperidone, quetiapine, risperidone, sertindole, ziprasidone, zotepine) Captodiame CEPC Cinanserin Cyproheptadine Deramciclane Desmetramadol Dotarizine Eltoprazine Ergolines (e.g., amesergide, bromocriptine, LY-53857, LY-215840, mesulergine, metergoline, methysergide, sergolexole) Etoperidone Fluoxetine FR-260010 Irindalone Ketanserin Ketotifen Latrepirdine (dimebolin) Medifoxamine Metitepine (methiothepin) Nefazodone Pirenperone Pizotifen Propranolol Ritanserin RS-102221 S-14671 SB-200646 SB-206553 SB-221284 SB-228357 SB-242084 SB-243213 SDZ SER-082 Tedatioxetine Tetracyclic antidepressants (e.g., amoxapine, aptazapine, esmirtazapine, maprotiline, mianserin, mirtazapine) TIK-301 Tramadol Trazodone Tricyclic antidepressants (e.g., amitriptyline, nortriptyline) Typical antipsychotics (e.g., chlorpromazine, loxapine, pimozide, pipamperone, thioridazine) Xylamidine Unknown/unsorted: Efirenz Ergolines (e.g., ergometrine (ergonovine), methylergometrine (methylergonovine)) 5-HT3–75-HT3 Agonists: Alcohols (e.g., butanol, ethanol (alcohol), trichloroethanol) m-CPBG Phenylbiguanide Piperazines (e.g., BZP, mCPP, quipazine) RS-56812 Serotonin (5-HT) SR-57227 SR-57227A Tryptamines (e.g., 2-Me-5-HT, 5-CT, bufotenidine (5-HTQ)) Volatiles/gases (e.g., halothane, isoflurane, toluene, trichloroethane) YM-31636 Positive allosteric modulators: 5-Aminoindole 5-Chloroindole 5-Hydroxyindole Catechol Chloroform meta-Chlorophenylbiguanide (mCPBG) Colchicine Ethanol (alcohol) Halothane Indole Isoflurane TMPPAA Antagonists: Alosetron Anpirtoline Arazasetron AS-8112 Atypical antipsychotics (e.g., clozapine, olanzapine, quetiapine) Azasetron Batanopride Bemesetron (MDL-72222) Cilansetron CSP-2503 Dazopride Dolasetron Galanolactone Granisetron Lerisetron Memantine Ondansetron Palonosetron Ramosetron Renzapride Ricasetron Tedatioxetine Tetracyclic antidepressants (e.g., amoxapine, mianserin, mirtazapine) Thujone Tropanserin Tropisetron Typical antipsychotics (e.g., loxapine) Volatiles/gases (e.g., nitrous oxide, sevoflurane, xenon) Vortioxetine Zacopride Zatosetron Negative allosteric modulators: Bupropion Colchicine Hydroxybupropion Unknown/unsorted: LY-53857 Piperazines (e.g., naphthylpiperazine) 5-HT4 Agonists: 5-MT BIMU8 Capeserod Cinitapride Cisapride CJ-033466 Dazopride Metoclopramide Minesapride Mosapride Prucalopride PRX-03140 Renzapride RS-67333 RS-67506 Serotonin (5-HT) Tegaserod Usmarapride Velusetrag Zacopride Antagonists: GR-113808 GR-125487 L-Lysine Piboserod RS-39604 RS-67532 SB-203186 SB-204070 5-HT5A Agonists: Ergolines (e.g., 2-Br-LSD (BOL-148), ergotamine, LSD) Serotonin (5-HT) Tryptamines (e.g., 5-CT) UCSF648 Valerenic acid Antagonists: Asenapine Latrepirdine (dimebolin) Metitepine (methiothepin) Ritanserin SB-699551 Unknown/unsorted: Ergolines (e.g., metergoline, methysergide) Piperazines (e.g., naphthylpiperazine) 5-HT6 Agonists: Ergolines (e.g., dihydroergocryptine, dihydroergotamine, ergotamine, lisuride, LSD, mesulergine, metergoline, methysergide) Hypidone Serotonin (5-HT) Tryptamines (e.g., 2-Me-5-HT, 5-BT, 5-CT, 5-MT, Bufotenin, E-6801, E-6837, EMD-386088, EMDT, LY-586713, N-Me-5-HT, ST-1936, tryptamine) WAY-181187 WAY-208466 Antagonists: ABT-354 Atypical antipsychotics (e.g., aripiprazole, asenapine, clorotepine, clozapine, fluperlapine, iloperidone, olanzapine, tiospirone) N-101 N-211 N-322 N-397 BGC20-760 BVT-5182 BVT-74316 Cerlapirdine EGIS-12233 GW-742457 Idalopirdine Ketanserin Landipirdine Latrepirdine (dimebolin) Masupirdine Metitepine (methiothepin) MS-245 PRX-07034 PZKKN-94 Ritanserin Ro 04-6790 Ro 63-0563 SB-258585 SB-271046 SB-357134 SB-399885 SB-742457 Tetracyclic antidepressants (e.g., amoxapine, mianserin) Tricyclic antidepressants (e.g., amitriptyline, clomipramine, doxepin, nortriptyline) Typical antipsychotics (e.g., chlorpromazine, loxapine) Unknown/unsorted: Ergolines (e.g., 2-Br-LSD (BOL-148), bromocriptine, lergotrile, pergolide) Piperazines (e.g., naphthylpiperazine) 5-HT7 Agonists: 8-OH-DPAT AS-19 Bifeprunox E-55888 Ergolines (e.g., LSD) LP-12 LP-44 LP-211 RU-24969 Sarizotan Serotonin (5-HT) Triptans (e.g., frovatriptan) Tryptamines (e.g., 5-CT, 5-MT, bufotenin, N-Me-5-HT) Antagonists: Atypical antipsychotics (e.g., amisulpride, aripiprazole, asenapine, brexpiprazole, clorotepine, clozapine, fluperlapine, olanzapine, risperidone, sertindole, tiospirone, ziprasidone, zotepine) Butaclamol DR-4485 EGIS-12233 Ergolines (e.g., 2-Br-LSD (BOL-148), amesergide, bromocriptine, cabergoline, dihydroergotamine, ergotamine, LY-53857, LY-215840, mesulergine, metergoline, methysergide, sergolexole) JNJ-18038683 Ketanserin LY-215840 Metitepine (methiothepin) Ritanserin SB-258719 SB-258741 SB-269970 SB-656104 SB-656104A SB-691673 SLV-313 SLV-314 Spiperone SSR-181507 Tetracyclic antidepressants (e.g., amoxapine, maprotiline, mianserin, mirtazapine) Tricyclic antidepressants (e.g., amitriptyline, clomipramine, imipramine) Typical antipsychotics (e.g., acetophenazine, chlorpromazine, chlorprothixene, fluphenazine, loxapine, pimozide) Vortioxetine Negative allosteric modulators: Oleamide Unknown/unsorted: Ergolines (e.g., lisuride, pergolide) Piperazines (e.g., naphthylpiperazine) See also: Receptor/signaling modulators Adrenergics Dopaminergics Melatonergics Monoamine reuptake inhibitors and releasing agents Monoamine metabolism modulators Monoamine neurotoxins